/Engine/Source/Runtime/Portal/Services/Public/Account/IPortalUser.h
In the case where there is no cached entitlement data and the latest entitlements have yet to be retrieved, then false will be returned. The Portal will not wait for the entitlements to update before returning a response. This state can be detected when the RetrievedFromCacheLevel is None.
[TAsyncResult](API\Runtime\Core\Async\TAsyncResult)< [FPortalUserIsEntitledToItemResult](API\Runtime\PortalServices\Account\FPortalUserIsEntitledToItemResul-) > IsEntitledToItem ( const [FString](API\Runtime\Core\Containers\FString) & ItemId, EEntitlementCacheLevelRequest CacheLevel )